Gas-furnace.



A. H. LEWIS.

GAS FURNACE. APPLICATION FILED JUNE 25,1913.

1,080,838, Patented Dec.9, 1913.

2 SHEETS-SHEET 1.

/9 nu w J i /7 5 J 24 5 7 2 MIL Attorneys COLUMBIA PLANDGRAPH c0., WASHIN nnnnnnn c.

A. H. LEWIS.

GAS FURNACE.

APPLICATION FILED JUNE 25, 1913.

Witnsses Patented Dec. 9, 1913.

2 SHEETS-SHEET 2.

entor Attorneys COLUMBIA PLANOGRAPH CO.,WASHINCITON, D. c.

ALBERT HQ LEWIS, O1 BELLEVUE, OHIO.

GAS-FURNACE.

Sp e cifieation of Letters Patent.

Patented Dec. 9, 1913.

Application filed June 25, 1913. Serial No. 775,792.

To all whom it may concern it known that l, ALBERT H. Lewis, a

citizen of the United States, residing at- Bellevue, in the county of Huron and State of Ohio, have invented a new and .useful Gas-Furnace, of which the following is a specification.

The present invention appertains to heaters or gas furnaces, and aims to provide a novel and improved device of that character.

One of the objects of the present invention is to providea novel and improved construction of heater or gas furnace possessing a maximum eiiiciency, in order that air may be heated to the desired degree with a ninimnm expenditure of fuel.

Another object of the present invention is to provide a heater or furnace of thenature indicated characterized by simplicity, durability, rigidity andinexpensiveness of construction as well being useful and efficient in operation.

A further object of the present invention is to provide aheater or burner embodying a unique combination of superposed annular radiating chambers, and a central fire. box and combustion chamber.

ll ith the foregoing general objects outlined, and with other objects in view, it will be apparent as the nature of the invention is better understood, that the present invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention has been illustrated in its preferred embodimentin the accompanying drawings, wherein Figure 1 is a vertical central section of the improved furnace. Figs. 2 and 3 are sectional views on a reduced scale taken on the respective .lines 2 and of Fig. 1. Fig. t is an elevation of one of the radiating or heating chambers, a, portion thereof being broken away on the line 4.-4: of Fig. 2.

In carrying out the invention, there is provided the usual galvanized sheet metal shell or casing 1, enveloping the interior parts, and, which is provided witha lower air inlet 2 and upper air outlets 3. The air inlet 2 may be of any suitable character, as

the ordinary air conduit, or the lower end of the casing or shell 1 may be spaced from theufloor or supporting surface by means of legs 1- to admit fresh air. The casing 1 U provided with a door opening 5 in its front wall, and a suitable door 6 is hinged to the casing for normally closing the opening 5.

lVithin the casing 1 are disposed the annular radiating or heating chambers designated generally by the numerals 7. The radiating chambers '7 are disposed concentrically within the casing in superposed relation, and are suitably spaced from each other as well as from the casing. Each of the radiating chambers 7 comprises the annular top and bottom plates 8, which are preferably cast from suitable metal, and the outer and inner annular shells or rings '9 and 10. respectively. The shells or rings 9- and 16 are preferably fashioned from suitable sheet metal or the like, and their edges are preferably received by annular grooves 11 provided. in the plates 8 adjoining their respective edges.

Tne top and bottom plates 8 of each chan'iber 7 are clamped together, or rat-her, the rim 9 and 10 are clamped between the plates 8, oy means of draft bolts 13 connecting peripheral cars 12 carried by the respective plates 8, and further by similar bolts 15 connecting the respective ears 1% pro jectine; from the inner edges of the plates 8. The bolts 13 and 15 serve to clamp the plates 8 against the edges of the respective rings 9 and 10, whereby the several parts of the respective chambers 7 are retained in position.

its illustrated, three of the radiating chambers are provided, although it is to be understood that any number may be employed according to the circumstances. The respective radiating chambers are maintained in spaced relation by means of supporting members 16 disposed between the peripheral portions of the respective or ad;- joining plates 8 and havf 1g their terminals engaged by the respective iolts The supporting members 16 are preferably COP; structed of strips or bars of metal having their ends bent angularly and apertured to be engaged by the bolts 13, and are of proper length to properly space the radiating chambers apart. The radiating chambers, as whole, are supported upon the floor, or base, by means of legs 16 attached to the lowest radiating chamber 7, the legs 16 being preferably formed of strips or bars of metal having their ends bent angularly, the upper ends being apertured for engagement by the respective bolts 13 of the lowest radiating chamber 7. It is to be understood, however, that the several chambers may be spaced in various manners, and that the chambers as a whole, may be suitably supported upon the floor or base.

Each of the plates 8 of the respective radiating chambers is provided with an opening 17 at one side, or adjoining the back of the casing 1, the openings 17 of the respective plates, being in vertical alinement. The respective openings 17 of the upper and lower plates of each radiating chamber provide inlet and outlet ports for the respective chamber 7, as will hereinafter appear.

Suitable metal fiues 18 are disposed in the respective radiating chambers 7, an annular series of fines 18 being provided for each radiating chamber, and having their ends attached to the respective plates 8, the plates being provided with openings registering with the ends of the fiues, in order to provide air passages through the respective radiating chambers. The fines 18 of each series are arranged in staggered relation with respect to one another, as is preferable, and have their ends engaged to the respective plates 8 in any convenient manner, preferably by means of grooves provided in the plates 8, similar to the grooves 11 above described. Any suitable number of flues 18 may be provided for each radiating chamber, the fines being interrupted at the openings 17, for the purpose which will hereinafter appear.

A partition or division plate 19 is provided within the rear portion of each radiating chamber 7, the same being disposed diagonally or obliquely and extending between the respective openings 17 of the top and bottom plates 8. The respective plates 19 are attached to the respective plates 8 and rings 910 in any suitable manner so as to divide the radiating chambers, the respective openings 17 communicating with the interior of the respective chambers 7 at opposite sides of the division plates or par tltions 19. It will thus be evident that gases admitted through the upper opening 17 of each of the radiating chambers are constrained to pass around the radiating chamber along the series of the lines 18 to the lower opening 17.

The respective radiating chambers are in communication, this being accomplished by means of the pipe sections 20 interposed between the respective or adjoining openings 17, as clearly seen in Fig. 1. The ends of the pipe sections 20 are preferably received by annular grooves 21 provided in the respective plates 8 adjoining the edges of the the uppermost opening 17 to the lowermost opening 17 The passage through the pipe sections 20 may be controlled so as to regulate the draft,

and also to retard the gases within the respective radiating chambers, this being accomplished by means of dampers 22 pivoted within the respective pipe sections 20, and pivoted with stems 23 extending rearwardly through the casing or shell 1, to be controlled by hand.

The fire box or combustion chamber has been designated generally by the numeral 24:, the same being preferably disposed intermediate the lower and intermediate radiating chambers. The fire box or combustion chamber is provided with the conical top and bottom, 25 and 26 respectively, the peripheral portion of the fire box preferably projecting or extending between the respective radiating chambers 7, but being spaced therefrom. The fire box 24 is provided with an inlet passage 27 extending to the door opening 5 and having its outer end attached to the casing 1, in order that the door 6 will normally close the passage 27 leading to the fire box. A vertical pipe 28 is attached to the apex of the top 25 of the fire box and extends axially within the casing and radiator chambers, the pipe 28having its upper end directed angularly as at29, so as to communicate with the opening 17 of the uppermost radiating chamber. The products of combustion are thus directed from the fire box to the uppermost radiating chamber, as will be apparent. i

Fresh air is supplied to the fire box or combustion chamber 24 by means of a suitable intake pipe 30 passing through the lower endof the casing 1 and having its inner end directed upwardly, as at 31, and attached to the apex of the bottom 26 of the fire box. The intake pipe 30 may lead to any suitable source of air, so as to supply or feed the required amount of air to the fire box.

The fire box 24 is preferably supported by means of legs 32 extending to the floor or base within the lowermost radiating chamber 7, although the fire box may be supported in any other suitable manner.

Any suitable gas burner 33 is disposed within the fire box 24, and is supplied with gas or fuel by means of the'feed pipe 34:

leading outwardly through the passage 27 In operation, when the gas is admitted to the burner 33 and ignited, combustion will be supported by the air supplied through the inlet pipe 30, it being observed that the products of combustion will rise axially or centrally upward within the radiating chambers to the uppermost radiating chamber, from whence the products of combustion or gases will circulate successively through the respective radiating chambers, from top to bottom, to be discharged through the exhaust pipe 35 to the chimney (not shown). In this manner, a down draft is accomplished through the several radiating chambers, the products of combustion first passing into the upper radiating chamber, which will be maintained at the highest temperature, thence into the intermediate radiating chamber, which will consequently be of lower temperature, and finally into the lowermost radiating chamber, which will be of the lowest temperature. The air admitted into the casing through the inlet 2 will rise around the radiating chambers and fire box, and will also pass through the several fiues 18, in order that the air may be heated to the desired degree, before discharging through the outlets 3. The air in passing through the fines 18, which are heated by the circuituous path of the products of combustion through the several radiating chambers, will be gradually increased in temperature, as it ascends through the several radiating chambers.

It is to be observed that the products of combustion pass completely around the several radiating chambers, and leave the respect-ive radiating chambers at points directly opposite the points of intake, in order to increase the efliciency of the furnace. The air to be heated not only passes through the fines 18, but passes exteriorly and interiorly of the several radiating chambers, and also around the fire box, in order that a 1naximum heating surface may be provided with which the air may contact in its ascension through the furnace. The radiating surface also includes the pipe 28, as will be apparent.

The passages of the products of combustion, from one radiating chamber to the other, is controlled by the dampers 20, in order that the gases may be properly held within the several radiating chambers, and in order to also regulate the draft. Thus, by controlling the draft through the medium of the dampers 22, the heated gases may be retarded within the respective radiating chambers, to increase the efliciency of the device.

The products of combustion are thoroughly confined, and are effectively separated from the heated air, in order that the furnace will be absolutely or perfectly fumed.

The furnace may be constructed in various sizes and proportions, accordingly to the requirements, and may also be employed as an auxiliary furnace in connection with prevailing coal furnaces, or the like. The casing or jacket 1, as well as the other parts, may also be altered in configuration, as is obvious.

Having fully described the invention what is claimed as new is In a furnace, a jacket having a door, a lower air inlet and upper air outlets, a plurality of superimposed annular radiating chambers, pipe sections connecting the respective chambers, a central fire box disposed Within the jacket intermediate two of the radiating chambers and having an air inlet passage extending between the said radiating chambers to the door, a vertical pipe extending axially upward from the fire box and connected to the upper radiating chamher, a fresh air supply pipe entering the lower portion of the casing, extending axially upward and attached to the fire box, and a discharge pipe extending through the jacket to the lower radiating chamber.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

ALBERT H. LEWIS.

Witnesses:

CHAS. H. SANDMEISTER, ELEANOR A. HUSBAND.

Conies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents, Washington. D. G. 

